"At this point in my life, I'm 32, and I feel sexier than ever," she said, while discussing her recent Maxim magazine photo shoot. "It was all about appreciating the woman that I've become and effortless sexy. Not trying to hard."

Aguilera, who will return to "The Voice" this season, said that she's always embraced her sexuality, and the bedroom is "the one place I can let go [and say], 'You do the work.'"

"Expressing myself in a sexual way, no matter how that changes throughout the years, has always been something that comes naturally to me. Easy," she said.

Though she's been dating her boyfriend, Matt Rutler since 2010, Aguilera also gave tips on what she looks for in a partner.

"I think effortless sexy is key. Everybody says, 'Be yourself,' but I just don't try too hard. That's the biggest turn-off," she said. "Trying to be too macho and all that stuff, that just doesn't work for me."

"It's all in the details," she continued. "It's the little thoughtful things that count. Listening and seeing what might impress the girl in a genuine way."